SNOFLO
 



YOUNGS LAKE CASCADES DAM

RESERVOIR LEVELS
Soil Dam Tr-Cedar River
April 26, 2025


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Youngs Lake Cascades Dam, also known as Inlet Dam, is a significant earth dam located in King County, Washington, along the Tr-Cedar River. Built in 1950 by the local government for water supply purposes, this dam stands at a hydraulic height of 16 feet and has a storage capacity of 35,450 acre-feet. With a drainage area of 2.19 square miles and a surface area of 690 acres, this dam plays a crucial role in water resource management in the region.

Managed by the Washington Department of Ecology, Youngs Lake Cascades Dam is state-regulated, inspected, and enforced to ensure its structural integrity and safe operation. The dam is classified as having a significant hazard potential, but its condition assessment in 2019 deemed it satisfactory. Emergency action plans are in place, and regular inspections are conducted to assess any potential risks and mitigate them effectively.

For water resource and climate enthusiasts, the Youngs Lake Cascades Dam serves as a vital infrastructure supporting water supply in the region. With its impressive storage capacity and strategic location along the Tr-Cedar River, this earth dam plays a crucial role in managing water resources and ensuring the safety and well-being of the surrounding communities. The dam's state-regulated status and satisfactory condition assessment highlight the commitment to maintaining its structural integrity and mitigating potential risks for the benefit of all stakeholders involved.

Year_Completed 1950
River_Or_Stream Tr-Cedar River
Primary_Dam_Type Earth
Surface_Area 690
Hydraulic_Height 16
Drainage_Area 2.19
Nid_Storage 35450
Structural_Height 16
Hazard_Potential Significant
Foundations Soil
Nid_Height 16
       

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